spring boot如何整合redis主从sentinel方式

springboot整合redis主从sentinel

一主二从三sentinel配置

• 1、master:127.0.0.1:6379

• 2、slave1:127.0.0.1:6380

• 3、slave2:127.0.0.1:6381

• 4、sentinel1:127.0.0.1:26379

• 5、sentinel2:127.0.0.1:26479

• 6、sentinel3:127.0.0.1:26579

• 7、监听的主机名:mymaster

• 8、附上sentinel1的配置

port 26379
sentinel monitor mymaster 127.0.0.1 6379 2
sentinel down-after-milliseconds mymaster 5000
sentinel parallel-syncs mymaster 1
sentinel failover-timeout mymaster 15000

新建spring boot工程，并加入Redis依赖

工程结构

如下：

pom文件如下：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
 
	<groupId>com.chhliu.springboot.redis</groupId>
	<artifactId>springboot-redis</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>
 
	<name>springboot-redis</name>
	<description>Demo project for Spring Boot redis</description>
 
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.4.3.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
 
	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
		<java.version>1.7</java.version>
	</properties>
 
	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-data-redis</artifactId>
		</dependency>
 
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
	</dependencies>
 
	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>
</project>

修改application.properties配置文件

配置文件添加内容如下:

########################################################
###REDIS (RedisProperties) redis基本配置；
########################################################
# database name
spring.redis.database=0
# server host1 单机使用，对应服务器ip
#spring.redis.host=127.0.0.1  
# server password 密码，如果没有设置可不配
#spring.redis.password=
#connection port  单机使用，对应端口号
#spring.redis.port=6379
# pool settings ...池配置
spring.redis.pool.max-idle=8
spring.redis.pool.min-idle=0
spring.redis.pool.max-active=8
spring.redis.pool.max-wait=-1
# name of Redis server  哨兵监听的Redis server的名称
spring.redis.sentinel.master=mymaster
# comma-separated list of host:port pairs  哨兵的配置列表
spring.redis.sentinel.nodes=127.0.0.1:26379,127.0.0.1:26479,127.0.0.1:26579

新建Redis服务

package com.chhliu.springboot.redis; 
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;
 
@Service("redisService")
public class RedisService {
	@Autowired //操作字符串的template，StringRedisTemplate是RedisTemplate的一个子集
	private StringRedisTemplate stringRedisTemplate;
	
	@Autowired  // RedisTemplate，可以进行所有的操作
        private RedisTemplate<Object,Object> redisTemplate;  
	
	public void set(String key, String value){
		stringRedisTemplate.opsForValue().set(key, value);
	}
	
	public void set(Student s){
		redisTemplate.opsForValue().set(s.getId(), s);
	}
	
	public String get(String key){
		return stringRedisTemplate.opsForValue().get(key);
	}
	
	public Student getStudent(String key){
		return (Student) redisTemplate.opsForValue().get(key);
	}
}

依赖的vo如下：

package com.chhliu.springboot.redis; 
import java.io.Serializable; 
public class Student implements Serializable{ 
	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	private String id;	
	private String name;	
	private String age;	
	private String grade; 
       // 省略getter,setter
	/**
	 * attention:
	 * Details：TODO
	 * @author chhliu
	 * 创建时间：2017-1-18 下午2:24:39
	 * @return
	 */
	@Override
	public String toString() {
		return "Student [id=" + id + ", name=" + name + ", age=" + age
				+ ", grade=" + grade + "]";
	}
}

测试类

package com.chhliu.springboot.redis; 
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
 
@RunWith(SpringRunner.class)
@SpringBootTest
public class SpringbootRedisApplicationTests {	
	@Autowired
	private RedisService service;
 
	@Test
	public void contextLoads() {
		service.set("myname", "chhliu");
		Student s = new Student();
		s.setId("001");
		s.setName("chhliu");
		s.setGrade("一年级");
		s.setAge("28");
		service.set(s);
		
		String name = service.get("myname");
		System.out.println("name:"+name);
		
		Student stu = service.getStudent("001");
		System.out.println(stu);
	} 
}

测试结果

name:chhliu

Student [id=001, name=chhliu, age=28, grade=一年级]

redis哨兵模式sentinel与springboot集成

Redis的哨兵模式是官方提供的一种高可用解决方案，而且配置非常简单。

安装Redis集群

本文使用redis-5.0.5，redis安装在/soft/redis目录下，需新建/soft/redis/data目录

主节点配置  

vim config/redis-6379.conf

# bind 127.0.0.1 
port 6379
protected-mode no
daemonize yes
pidfile "/var/run/redis_6379.pid"
dir "/soft/redis/data"
dbfilename "dump-6379.rdb"
logfile "log-6379.log"

从节点1配置

vim config/redis-6380.conf

# bind 127.0.0.1
port 6380
protected-mode no
daemonize yes
pidfile "/var/run/redis_6380.pid"
dir "/soft/redis/data"
dbfilename "dump-6380.rdb"
logfile "log-6380.log"
 
replicaof 192.168.4.176 6379

从节点2配置

vim config/redis-6381.conf

# bind 127.0.0.1
port 6381
protected-mode no
daemonize yes
pidfile "/var/run/redis_6381.pid"
dir "/soft/redis/data"
dbfilename "dump-6381.rdb"
logfile "log-6381.log"
 
replicaof 192.168.4.176 6379

配置说明

# bind 127.0.0.1  注释掉这配置，以便其他机器的能连接redis

protected-mode no 关闭保护模式，以便其他机器的能连接redis

daemonize后台模式启动

redis-v5版本使用replicaof替换旧的slaveof指令。

启动这3个节点，在/soft/redis目录下运行

redis-server config/redis-6379.conf
redis-server config/redis-6380.conf
redis-server config/redis-6381.conf

打开主节点客户端看看配置是否成功

redis-cli -p 6379
info replication

再配置3个哨兵，监控集群

哨兵节点1

vim config/redis-sentinel-26379.conf

port 26379
daemonize yes
pidfile "/var/run/redis-sentinel-26379.pid"
dir /tmp
logfile "log-sentinel-26379.log"
sentinel monitor mymaster 192.168.4.176 6379 2
sentinel down-after-milliseconds mymaster 30000
sentinel parallel-syncs mymaster 1
sentinel failover-timeout mymaster 180000
sentinel deny-scripts-reconfig yes

哨兵节点2

vim config/redis-sentinel-26380.conf

port 26380
daemonize yes
pidfile "/var/run/redis-sentinel-26380.pid"
dir /tmp
logfile "log-sentinel-26380.log"
sentinel monitor mymaster 192.168.4.176 6379 2
sentinel down-after-milliseconds mymaster 30000
sentinel parallel-syncs mymaster 1
sentinel failover-timeout mymaster 180000
sentinel deny-scripts-reconfig yes

哨兵节点3

vim config/redis-sentinel-26381.conf

port 26381
daemonize yes
pidfile "/var/run/redis-sentinel-26381.pid"
dir /tmp
logfile "log-sentinel-26381.log"
sentinel monitor mymaster 192.168.4.176 6379 2
sentinel down-after-milliseconds mymaster 30000
sentinel parallel-syncs mymaster 1
sentinel failover-timeout mymaster 180000
sentinel deny-scripts-reconfig yes

配置说明

monitor mymaster 192.168.4.176 6379 2

Master主机的名称是mymaster，IP地址是192.168.4.176。后面的2表示有2个sentinel认为master下线了，则线下master，建议设置为 sentinel节点数/2 1

down-after-milliseconds

发送ping请求给redis节点，在指定时间内未收到回复，则认为该节点应该被下线

parallel-syncs

在执行故障转移时，最多可以有多少个从节点同时对新的主服务器进行同步。

启动哨兵

redis-sentinel config/redis-sentinel-26379.conf
redis-sentinel config/redis-sentinel-26380.conf
redis-sentinel config/redis-sentinel-26381.conf

配置spring-boot

pom.xml中导入依赖

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>

application.properties加入两行配置

# 使用哨兵模式不能加以下两行配置，其他配置可以加
# spring.redis.host=192.168.4.176
# spring.redis.port=6379
 
spring.redis.sentinel.master=mymaster
spring.redis.sentinel.nodes=192.168.4.176:26379, 192.168.4.176:26380, 192.168.4.176:26381

写一个测试类运行

@RunWith(SpringRunner.class)
@SpringBootTest
public class Sentinel001 { 
    @Autowired
    RedisTemplate redisTemplate;
 
    @Test
    public void test001() throws Exception{
        while (true){
            String key = "time:" + new Date().getTime();
            redisTemplate.opsForValue().set(key, new Date().getTime());
            TimeUnit.MILLISECONDS.sleep(100L);
            System.out.println(redisTemplate.opsForValue().get(key));
        } 
    } 
}

然后杀掉master实例（端口号为6379的redis）的进程

ps -ef|grep redis
kill -9 11110

观察代码编辑器控制台输出，经过短暂的时间（大概是50s）后，程序重新运行正常

在6380和6381节点执行info replication，发现6381变成了主节点

查看下6380、6381的配置文件

cat config/redis-6380.conf
replicaof 192.168.4.176 6381
replicaof 变成了192.168.4.176 6381，而不是刚开始配置时的192.168.4.176 6379
cat config/redis-6381.conf 
replicaof 的配置被删除了

重启下6379这个redis实例

redis-server config/redis-6379.conf

6379变成了6381的从节点

RedisTemplate目前并未支持读写分离，因此读写操作都将发送到主节点进行处理，这一点比较令人不爽。运行上面的代码，在3个redis客户端运行monitor发现，只有master会运行get、set命令，从节点只运行了set命令。

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